Can you give an example?
R.E. Boss > -----Oorspronkelijk bericht----- > Van: Programming <programming-boun...@forums.jsoftware.com> > Namens Henry Rich > Verzonden: zondag 7 juli 2019 20:49 > Aan: programm...@jsoftware.com > Onderwerp: [Jprogramming] Fast substring collection > > I just want to read this into the record. > > The task: to run substrings of a string y together in a single list, where the > substrings are given by an nx2 table x of (start,length) pairs. > > The best solution is: > > x (,."1@[ ;@:(<;.0) ]) y > > (as of the next 9.01 beta). > > The ,."1@[ creates a virtual block; the ;@:(<;.0) creates a virtual block for > each substring AND calculates the length of the final result as it goes > along. The characters are moved only once. > > This is not special code; it's code that takes advantage of the features that > are generally available. > > Henry Rich > > --- > This email has been checked for viruses by AVG. > https://www.avg.com > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
